TWI669401B - Thermal treatment apparatus - Google Patents

Abstract

A heat treatment device includes a feed port, a heating coil, a cooling section, and a discharge port. The heating coil includes a first section and a second section. The first section is located between the second section and the feed port. The heating capacity of the first section is higher than the heating capacity of the second section. The cooling section is adjacent to the second section. The cooling section is located between the heating coil and the discharge opening.

Description

Heat treatment device

The present disclosure relates to a heat treatment apparatus, and in particular to a heat treatment apparatus having a heating coil.

In order to meet the needs of consumers in the quality of metal products, processors usually perform appropriate heat treatment on the outer surface of metal workpieces, such as: bright annealing. For example, the heat treatment apparatus includes a temperature rising section (or a heating section) and a temperature holding section located behind the temperature rising section, and the temperature rising section and the temperature holding section are usually implemented by different means. Specifically, the heating section is usually a device that provides thermal energy, and the temperature holding section is usually a chamber composed of a refractory material having a low thermal conductivity.

Some embodiments of the present disclosure provide an improved heat treatment apparatus that utilizes a single heating coil to effect both temperature rise and temperature hold.

In some embodiments of the present disclosure, a heat treatment apparatus includes a feed port, a heating coil, a cooling section, and a discharge port. The heating coil includes a first section and a second section. The first section is located between the second section and the feed port. The heating capacity of the first section is higher than the heating of the second section ability. The cooling section is adjacent to the second section. The cooling section is located between the heating coil and the discharge opening.

In the above embodiment, since the heating capability of the first section of the heating coil is greater than the heating capability of the second section, the first section can be used to raise the temperature of the metal workpiece, and can be used as a heating section of the heat treatment device, and The two sections can be used to maintain the temperature of the metal workpiece in a fixed range and can be used as the temperature holding section of the heat treatment apparatus. Therefore, the heat treatment apparatus provided by the embodiment of the present disclosure can achieve the effects of temperature rise and temperature hold by a single heating coil.

The above description is only for explaining the problems to be solved by the present disclosure, the technical means for solving the problems, the effects thereof, and the like, and the specific details of the disclosure will be described in detail in the following embodiments and related drawings.

100‧‧‧ Feed inlet

200, 200a, 200b‧‧‧ heat treatment section

210‧‧‧Shell

220‧‧‧heating coil

221‧‧‧ hollow metal tube

222, 222a, 222b‧‧‧ first section

223‧‧‧Insulation sleeve

224, 224a, 224b‧‧‧ second section

230‧‧‧Power supply

240‧‧‧First conductive arm

250‧‧‧second conductive arm

260‧‧‧Mobile agencies

262‧‧‧First wheel

264‧‧‧Second wheel

270‧‧‧ Positioning cylinder

300‧‧‧cooling section

400‧‧‧Outlet

D1, D2, D3, D4‧‧‧ diameter

L1, L2‧‧‧ axial length

P1, P2, P3, P4‧‧ ‧ pitch

S‧‧‧ Space

T1‧‧‧ first channel tube

T2‧‧‧ second channel tube

X‧‧‧ direction

The above and other objects, features, advantages and embodiments of the present disclosure will be more apparent and understood. FIG. 1 is a side view of a heat treatment apparatus according to some embodiments of the present disclosure; 2 is a schematic perspective view of a heat treatment section according to some embodiments of the present disclosure; FIG. 3 is a cross-sectional view of a heating coil according to some embodiments of the present disclosure; and FIG. 4 is a cross-sectional view of a heat treatment section according to some embodiments of the present disclosure. Stereoscopic view; FIG. 5 is a schematic perspective view of a heat treatment section according to some embodiments of the present disclosure.

The plural embodiments of the present disclosure are disclosed in the following description, and for the sake of clarity, many of the details of the practice will be described in the following description. However, it should be understood by those skilled in the art that the details of the present invention are not essential to the details of the disclosure. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

The following embodiments are examples of the heat treatment apparatus disclosed in the present invention, but the disclosure is not limited thereto. In other embodiments, the heat treatment apparatus of the present disclosure may also be applied to other types of heat treatment, and is not limited to the brilliant heat treatment.

1 is a side elevational view of a heat treatment apparatus in accordance with some embodiments of the present disclosure. As shown in FIG. 1, the heat treatment apparatus includes a feed port 100, a heat treatment section 200, a cooling section 300, and a discharge port 400. The feed port 100, the heat treatment section 200, the cooling section 300, and the discharge port 400 are sequentially arranged and connected (for example, arranged from left to right along the X direction in the drawing). Specifically, in some embodiments, the heat treatment apparatus further includes a first passage tube T1 and a second passage tube T2. The feed port 100 is located at the inlet of the first passage tube T1, and the outlet of the first passage tube T1 is located in the heat treatment section 200. The discharge port 400 is located at the outlet of the second passage tube T2, and the inlet of the second passage tube T2 is located in the heat treatment section 200, and the second passage tube T2 passes through the cooling section. 300.

Thereby, a metal workpiece (not shown in the drawing) can enter the first passage tube T1 through the feed port 100 and enter the heat treatment section 200 through the first passage tube T1 to be first heat treated. When the metal workpiece leaves the heat treatment section 200, it enters the cooling section 300 and is cooled. Next, the cooled metal workpiece exits the heat treatment device from the discharge port 400.

In some embodiments of the present disclosure, the heat treatment performed by the heat treatment section 200 includes a temperature treatment after the temperature increase treatment and the temperature increase treatment, wherein the temperature increase rate of the metal workpiece is higher than the temperature increase rate of the metal workpiece by the temperature treatment. . In some embodiments, the rate of temperature rise caused by the temperature holding process on the metal workpiece approaches zero. In other words, the temperature of the metal workpiece during the temperature holding process is substantially constant. That is to say, the temperature of the metal workpiece in the temperature holding process is maintained within an allowable range without a large rise or fall.

For example, reference may be made to FIG. 2, which illustrates a perspective view of a heat treatment section 200 in accordance with some embodiments of the present disclosure. As shown in FIG. 2, the heat treatment section 200 includes a heating coil 220, a power source 230, a first conductive arm 240, and a second conductive arm 250. The heating coil 220 can be housed in the outer casing 210 (as shown in Figure 1). The power source 230 is electrically connected to the heating coil 220 through the first conductive arm 240 and the second conductive arm 250 to supply power to the heating coil 220. During the passage of the metal workpiece M through the heating coil 220, it is heated by the magnetic field generated by the heating coil 220.

Specifically, in some embodiments, the power source 230 can be an AC power source, and the heating coil 220 can be provided with alternating current such that the heating coil 220 Generate an alternating magnetic field. When the metal workpiece M enters the heating coil 220, the electromagnetic induction caused by the alternating magnetic field causes the metal workpiece M to induce an induced current (for example, an eddy current). The skin effect of the metal in the alternating magnetic field causes the induced current to concentrate on the surface of the metal workpiece M, thereby raising the surface temperature of the metal workpiece M to effect heat treatment of the metal workpiece M.

In some embodiments, as shown in FIG. 2, the heating coil 220 includes a first section 222 and a second section 224 that extends continuously from the first section 222. The first section 222 is located between the second section 224 and the feed port 100 (see Figure 1). That is, the first section 222 is closer to the feed port 100 than the second section 224 (see Figure 1). The heating capacity of the first section 222 is higher than the heating capacity of the second section 224. In other words, the rate of temperature rise caused by the first section 222 to the metal workpiece M may be greater than the rate of temperature rise caused by the second section 224 to the metal workpiece M. In some embodiments, the rate of temperature rise caused by the second section 224 to the metal workpiece M approaches zero. That is, the thermal energy provided to the metal workpiece M by the second section 224 may be offset from the thermal energy that escapes from the metal workpiece M.

Thereby, the second section 224 can serve as a temperature holding section of the heat treatment apparatus, and the first section 222 can serve as a temperature rising section of the heat treatment apparatus. In this way, the present disclosure can achieve the effects of temperature rise and temperature hold by a single heating coil 220 without additionally adding a temperature holding section composed of refractory material between the heating coil 220 and the cooling section 300. That is, the cooling section 300 is adjacent to the second section 224 of the heating coil 220 without a temperature holding section composed of a refractory material having a low thermal conductivity. Therefore, in the present disclosure, after the metal workpiece M leaves the second section 224 of the heating coil 220, it directly enters the cooling section 300. Medium, and no longer through the traditional temperature holding section composed of refractory materials.

In some embodiments, the difference in heating capacity of the first section 222 and the second section 224 is produced by the difference in pitch of the first section 222 and the second section 224. Specifically, the pitch P1 of the first section 222 is smaller than the pitch P2 of the second section 224. Thereby, the density of the coils in the first section 222 is greater than the density of the coils in the second section 224, so that the magnetic flux density generated by the first section 222 is greater than the magnetic flux density generated by the second section 224, thereby The intensity of the induced current caused by the first section 222 to the metal workpiece M is made higher than the induced current intensity of the second section 224 to the metal workpiece M. Therefore, the heating capacity of the first section 222 can be higher than the heating capacity of the second section 224.

In some embodiments, the ratio of the pitch P2 of the second section 224 to the pitch P1 of the first section 222 is between about 1.2 and 6. When the ratio of the pitch P2 of the second section 224 to the pitch P1 of the first section 222 is greater than 6, the pitch P2 of the second section 224 may be too large, so that the heating capability of the second section 224 is insufficient, and When the metal workpiece M is caused to pass through the second section 224, excessive cooling occurs. In contrast, when the ratio of the pitch P2 of the second section 224 to the pitch P1 of the first section 222 is less than 1.2, the pitch P2 of the second section 224 may be too small, so that the heating capability of the second section 224 is Too high, and may cause excessive temperature rise of the metal workpiece M as it passes through the second section 224.

In some embodiments, the heating coil 220 is wound in an axial direction in the X direction, and the axial length L1 of the first section 222 of the heating coil 220 is less than the axial length L2 of the second section 224. That is, when the metal workpiece M advances in a constant speed manner, the residence time of the metal workpiece M in the first section 222 is less than the residence time of the metal workpiece M in the second section 224. between. By such a difference in the axial length, the holding time of the metal workpiece M can be made higher than that of the metal workpiece to help make the overall temperature of the metal workpiece M more uniform. In other embodiments, the length of the second section 224 may also be appropriately adjusted according to the difference of the various types of metal workpieces M to meet the temperature holding time required for the various types of metal workpieces M.

In some embodiments, the first section 222 has one end remote from the second section 224 and the first conductive arm 240 extends from the power source 230 to the end of the first section 222. Similarly, the second section 224 has one end remote from the first section 222 and the second conductive arm 250 extends from the power source 230 to the end of the second section 224. Thereby, the power source 230 and the heating coil 220 can form a loop such that alternating current can pass through the first section 222 and the second section 224 to generate an alternating electric field.

In some embodiments, the heat treatment apparatus further includes a moving mechanism 260 for moving the metal workpiece M forward (eg, moving the metal workpiece M from the first section 222 to the second section 224). For example, the moving mechanism 260 can include a first roller 262 and a second roller 264. The first roller 262 is opposite to the second roller 264 in the direction of rotation. For example, when the first roller 262 is used to rotate clockwise, the second roller 264 is used to rotate counterclockwise. The gap between the first roller 262 and the second roller 264 is not larger than the diameter of the metal workpiece M, and this gap allows the metal workpiece M to pass. Thereby, the opposite sides (for example, the upper and lower sides) of the metal workpiece M closely contact the first roller 262 and the second roller 264, and when the first roller 262 and the second roller 264 rotate, the first roller The 262 and the second roller 264 can cooperate to advance the metal workpiece M.

In the embodiment shown in Fig. 2, the first roller 262 and the second roller 264 are arranged perpendicularly. For example, the first roller 262 is located above the second roller 264. However, in other embodiments, the first roller 262 and the second roller 264 may also be disposed non-perpendicularly. For example, the first roller 262 and the second roller 264 can be horizontally configured.

In some embodiments, the thermal processing apparatus further includes a positioning barrel 270. The axial direction of the positioning cylinder 270 is the same as the axial direction of the heating coil 220 (for example, both are parallel to the X direction). Thereby, after the metal workpiece M passes through the positioning cylinder 270, the positioning cylinder 270 can assist the metal workpiece M to enter the heating coil 220 along the X direction, thereby preventing the metal workpiece M from interfering with the heating coil 220. In some embodiments, the first section 222 of the heating coil 220 is partially sleeved on the positioning barrel 270 to facilitate the coaxial arrangement of the heating coil 220 and the positioning barrel 270.

FIG. 3 is a cross-sectional view of the heating coil 220 according to some embodiments of the present disclosure. As shown in FIG. 3, in some embodiments, the heating coil 220 includes a coil wound by a hollow metal tube 221 and an insulating sleeve 223. The hollow metal tube 221 is wrapped in the insulating sleeve 223. Thereby, when the metal workpiece M passes through the heating coil 220, the insulating sleeve 223 can prevent the current in the hollow metal pipe 221 from flowing out to the metal workpiece M. Further, when the pitch P1 of the first section 222 is small so that the coil density of the first section 222 is high, the insulating sleeve 223 can prevent adjacent two phases in the coil wound by the hollow metal tube 221. Contact creates an undesired magnetic field. The hollow metal tube 221 has a space S therein, which is available for fluid (e.g., circulating water) to circulate, thereby helping to maintain the heating coil 220 at an appropriate temperature without overheating.

FIG. 4 is a perspective view of a heat treatment section 200a according to some embodiments of the present disclosure. As shown in FIG. 4, the main difference between the heat treatment section 200a and the aforementioned heat treatment section 200 is that the diameters of the first section 222a and the second section 224a of the heating coil 220a are different, and thereby the difference in diameter is caused. The heating capacity of the first section 222a and the second section 224a is different. Specifically, the diameter D1 of the first section 222a is smaller than the diameter D2 of the second section 224b. Thereby, the magnetic flux density generated by the first section 222a is greater than the magnetic flux density generated by the second section 224a, so that the induced current intensity of the first section 222a on the metal workpiece M is higher than that of the second section 224a. The induced current intensity caused to the metal workpiece M. Therefore, the heating capacity of the first section 222a can be higher than the heating capacity of the second section 224a.

In some embodiments, the ratio of the diameter D2 of the second section 224a to the diameter D1 of the first section 222a is between about 1.2 and 6. When the ratio of the diameter D2 of the second section 224a to the diameter D1 of the first section 222a is greater than 6, the diameter D2 of the second section 224a may be too large, so that the heating capability of the second section 224a is insufficient, and may cause metal Excessive cooling occurs when the workpiece M passes through the second section 224a. In contrast, when the ratio of the diameter D2 of the second section 224a to the diameter D1 of the first section 222a is less than 1.2, the diameter D2 of the second section 224a may be too small, so that the heating capability of the second section 224a is too high, As a result, excessive temperature rise may occur when the metal workpiece M passes through the second section 224a.

In the embodiment shown in FIG. 4, if the difference in diameter between the first section 222a and the second section 224a can achieve the required difference in heating capacity, there is no need to pass the first section 222a and the second section. The pitch difference of segment 224a Differently adjust the heating capacity of both. Thus, the pitch of the first section 222a and the pitch of the second section 224a can be substantially equal. However, the disclosure is not limited thereto. For example, referring to FIG. 5, this figure illustrates a perspective view of a heat treatment section 200b according to some embodiments of the present disclosure. The main difference between the heat treatment section 200b and the aforementioned heat treatment section is that the diameters and pitches of the first section 222b and the second section 224b of the heating coil 220b are different, and the first zone is caused by the difference in diameter and the pitch. The heating capacity of the segment 222b and the second segment 224b is different.

Specifically, the diameter D3 of the first section 222b is smaller than the diameter D4 of the second section 224b, and the pitch P3 of the first section 222b is smaller than the pitch P4 of the second section 224b. Such a difference in diameter and pitch can cause the magnetic flux density generated by the first segment 222b to be greater than the magnetic flux density generated by the second segment 224b, thereby facilitating the heating capability of the first segment 222b to be higher than the second. The heating capacity of section 224b.

The present disclosure has been disclosed in the above embodiments, and is not intended to limit the present invention. Any one skilled in the art can make various modifications and retouchings without departing from the spirit and scope of the disclosure. The scope is subject to the definition of the scope of the patent application attached.

Claims (9)

A heat treatment device comprising: a feed port; a heating coil comprising a first section and a second section, the first section being located between the second section and the feed opening, the The heating capacity of a section is higher than the heating capacity of the second section, and the pitch of the first section is smaller than the pitch of the second section; a cooling section, adjacent to the second section; and a a port, the cooling section being located between the heating coil and the discharge port. The heat treatment apparatus of claim 1, wherein a ratio of a pitch of the second section to a pitch of the first section is between about 1.2 and 6. A heat treatment device comprising: a feed port; a heating coil comprising a first section and a second section, the first section being located between the second section and the feed opening, the The heating capacity of a section is higher than the heating capacity of the second section, wherein the diameter of the first section is smaller than the diameter of the second section; a cooling section adjacent to the second section; and a discharge opening The cooling section is located between the heating coil and the discharge port. The heat treatment device of claim 3, wherein a ratio of a diameter of the second section to a diameter of the first section is between about 1.2 and 6. The heat treatment device of claim 1, wherein the first section has an axial length that is less than an axial length of the second section. The heat treatment apparatus of claim 1, wherein the second section extends continuously from the first section. The heat treatment device of claim 1, wherein the heating coil comprises a hollow metal tube and an insulating sleeve covering the hollow metal tube. The heat treatment device of claim 1, further comprising: a power source electrically connected to the heating coil. The heat treatment device of claim 8, further comprising: a first conductive arm extending from the power source to one end of the first section away from the second section; and a second conductive arm extending from the power source To the end of the second section away from the first section.